#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int main() {
    char a;
    while (~scanf("%c", &a))
    {
        if ((a <= 'z' && a >= 'a') || (a <= 'Z' && a >= 'A'))
        {
            printf("%c is an alphabet.\n", a);
        }
        else {
            printf("%c is not an alphabet.\n", a);
        }
        getchar();
    }
    return 0;
}